package com.tzy.note.base.thread.lock;

//死锁：多个线程互相抱着对方需要的资源,然后形成僵持.
public class DeadLock {
    public static void main(String[] args) {
        Makeup g1 = new Makeup(0,"灰姑娘");
        Makeup g2 = new Makeup(1,"白雪公主");

        g1.start();
        g2.start();
    }
}
//口红
class Lipstick{}
//境子
class Mirror{}
//化妆
class Makeup extends Thread{
    //需要的资源只有一份,用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();
    int choice;//选择
    String girlName;//使用化妆品的人
    Makeup(int choice,String girlName){
        this.choice = choice;
        this.girlName = girlName;
    }

    @Override
    public void run() {
        //化妆
        try {
            //makeup();//死锁
            makeup2();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    //化妆,互相持有对方的锁,就是需要拿到对方的资源【一个线程同时抱两把锁-->死锁】
    private void makeup() throws InterruptedException {
        if(choice == 0){
            synchronized (lipstick){ //获得口红的锁
                System.out.println(this.girlName +  "获得口红的锁");
                Thread.sleep(1000);

                synchronized (mirror){ //一秒钟后想获得镜子
                    System.out.println(this.girlName +  "获得镜子的锁");
                }
            }
        }else {
            synchronized (mirror){ //获得镜子的锁
                System.out.println(this.girlName +  "获得镜子的锁");
                Thread.sleep(2000);

                synchronized (lipstick){ //一秒钟后想获得口红
                    System.out.println(this.girlName +  "获得口红的锁");
                }
            }
        }
    }

    //化妆,互相持有对方的锁,就是需要拿到对方的资源【一个线程同时抱两把锁-->死锁】
    private void makeup2() throws InterruptedException {
        if(choice == 0){
            synchronized (lipstick){ //获得口红的锁
                System.out.println(this.girlName +  "获得口红的锁");
                Thread.sleep(1000);
            }
            synchronized (mirror){ //一秒钟后想获得镜子
                System.out.println(this.girlName +  "获得镜子的锁");
            }
        }else {
            synchronized (mirror){ //获得镜子的锁
                System.out.println(this.girlName +  "获得镜子的锁");
                Thread.sleep(2000);
            }
            synchronized (lipstick){ //一秒钟后想获得口红
                System.out.println(this.girlName +  "获得口红的锁");
            }
        }
    }
}

